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P W. 'MAGKBNZIB u H. W. RAPPLBYE.

APPARATUS POR BURNING ILLUMINATING GAS.

Bake/z Zbl' y Patented'June 20, 1882.

h/zess N. PETERS. pnmo-Lmwgmphen washington. D. C.

l.'Z'o all whom it may conce-rn:

PHILIP W. MAGKENZIE, OF BLAUVELTVILLE, NEW YORK, AND HANNIBAL PATENTOFFICE.

W. RAPPLEYE, OF PHILADELPHIA, PENNSYLVANIA.

APPARATUS FOR BURNING lLLUMlNATlNG-GAS.

SPECIFICATION aiming part of Letters Patent No. 259,881, dated June 20,1882.

Application fueu February 11,1880.

Beit known that we, PHILIP W. MACKEN- ZIE, of Blauveltville, in thecounty of Rockland and State of New York, and HANNIBAL W. RAPPLEYE, ofthe city and county of Philadelphia, in the State ot' Pennsylvania, haveinvented certain new and'usefnlImprovements in Apparatus for BurningIlluminating-Gas, of which the fcllowingis a specification, referencebeing had to the accompanying drawings.

Our invention relates to the method of heating illuminating-gas 'priorto its introduction to a burner orgroup of burners by the waste heatfrom the flame of the same burner or group, whereby the illuminatingpower of the gas is increased and an economy in consumption effected.

Thel invention consists in the combination, with a burner or group ofburners, of a heater arranged above and to be heated by said burner orgroup, and composed ot' a chamber divided at different heights bytransverse perforated diaphragms, whereby a reverberatory action of thegas is produced in its passage through the heater to the burner orgroup.

We also preferably combine with the abovedescribed heater a primaryheater consisting of a coil of pipe arranged over the burner or group ofburners, and through which the/gas passes in its passage to thechamber-heater.

-In the drawings, Figure 1 is an elevation of a group of burners withheaters and their connections, illustrating theinvention. Fig. 2 is avertical section of the same, showing also a .35 jacket-ofnon-conductingmaterial which is not shown in Fig. 1; and Fig. 3 is ahorizontal section corresponding with Fig. 2.

The heaters are indicated byletters AB and the burners or groups ofburners by letters E.

In Figs. 1, 2, and 3 two heaters, A and B, are shown. The heater A iscomposed of several conical coils of metal pipe, a a a2, the laps ofwhose coils are so interposed and superposed close or nearly closetogether as to form substantially the equivalent of a hollow frustum ofa cone with double walls and with spiral passages within the wall. Threecoils are shown but the number may be varied, or a single one might b eused. The several colls are connected at both ends with a head, G, 5o

whichis arranged concentrically above them anddivided horizontally intotwo chambers, g gi, by a diaphragm, g2, the upper end of each coil beingconnected with the lower chamber, g, of the said head, and the pipes ofthe several coils being continued upward from the lowest lap or turn ofeach coil, as shown at ai", ai, and agit, and connected with the upperchamber, 9*, ot' the said head, with which the gassupply pipe h isconnected. The said chamber g is connected by a pipe, b, with a centralheater, B, from the bottom ot' which a pipe, bi, leads to the hollowring e, in which are secured the tips e* ci, constituting the burner orgroup E. f The central heater,B, is represented of cylindrical form,with perforated diaphragms to check the too rapid passage ofthe gasthrough it, and cause the gas to circulate with areverberatory actionbetween each pair or each two diaphragms. The gas entering the upperchamber, git, of the head G passes therefrom down the several extensionsa* ot* aztof the coils a a' a2, thence upward through the said coilsinto the lower chamber, g, of the head, thence through the pipe b, theheater B, and pipe b* to the burner or group of burners E, which shouldpreferably be so far below the heaters that the iiames from the burnerscannot impiuge upon the surfaces of the heaters,` and thereby have theirilluminating power diminished. The heaters are intensely heated bytheradiation from the iiame or flames-from the burner or burners and by thepassage in contact with their surfaces of the ascending column of theheated gaseous products of combustion from the said iiame or flames.

It has been found in practice that such heaters as are hereinabovedescribed may be heated to redness. The iixed or permanent gas passingthrough a heater or heaters so highly heated before en tering the burneris very highly expanded, and has its illuminating power very greatlyincreased, so that from a given volume of gas ata given ordinarypressure we are thusv enabled to obtain several times the quantity oflight that could be obtained bysame burners which produce the light verygreat economy is e'ected.

It may he here remarked that in arranging in a ring or circular seriesburner-tips which produce at llames We propose to so set them that theplanes of such flames will be radial, or approximately so, to the centerOf the circle. Such arrangement, however, forms no part of the presentinvention; but we may make it the subject of an application foraseparate patent.

Figs. 2 and 3 show the heater incased by an outer jacket, H, ofnon-conducting material, which may be composed Ot' asbestus-paper, anumber of sheets of which may be superposed to obtain suitablethickness.

We claiml. The combination, with a gas-burner or group of burners, ot' aheater arranged above and to be heated by said burner or group, andcomposed of a chamber, B, divided at diftereut heights by transverseperforated dia phragms, whereby a reverberatory action Of the gas isproduced in its passage through the heater to said burner or group,substantially as specified. 2 5

2. The combination, with a gasburner or group of burners, of the annularcoil-heater A and the cylindric heater B, comprising perforatedtransverse diaphragms or partitions, and into and through which the gaspasses after 3o it has been partly heated in said coil-heater and beforeit is supplied to the burner, substantially as specified.

P. W. MAGKENZIE. H. W. RAPPLEYE.

Witnesses to the signature of I?. W. Mackenzie:

FREDK. HAYNES, THOMAS E. Braun. Witnesses to the signature of H. W.Rappleye:

LEON H. FOLZ, ROBT. I. MONTGOMERY.

